Gust dalin



(Nfo Model.) v

' G. DALIN.

DRILLING MACHINE.

No. 462,397. Patented Nov. 3, 1891.

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Unirse STATES PATENT OFFICE.

.GUST DALI, OF ROCKFORD, ILLINOIS, ASSIGNOR TO THE MEOIIAICS MACHINECOMPANY, OF SAME PLACE.

DRlLLlNG-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 462,397, dated November3, 1891.

Application filed August 24, 1891. Serial No. 403,529. (No model.)

To all whom it may concern.:

Be it known that I, GUsT DALIN, a citizen of the United States, residingat Rockford, in the county of Xllini'iebago and State of Illinois, haveinvented certain new and useful Improvements in Drilling-Machines, ofwhich the following is a specification.

The principal object of my invention is to provide means for increasingand decreasing the speed of drilling-machines by the employmentoffriction-wheels; and it consists of certain new and useful features ofconstruction and combinations of parts hereinafter described, andspecifically pointed out in the claims.

Referring to the accompanying drawings, which form a part of thisspecification, Figure l is a front elevation of a drilling-machineembodying my improvements. Fig. 2 is a right-side elevation of the same.Fig. 3 is a view of a fragment of the platen-bracket of thedrilling-machine and devices for supporting the same, broken to bettershow the construction and connection.

Like letters of reference indicate corresponding parts throughout theseveral views.

A is the baseof the drill-frame.

A is a vertical tubular column rigidly connected therewith.

Bis a platen-bracket haviuga vertical tubular opening B extendingtherethrough to admit the column A', whereon it may be vertically slidand horizontally revolved for adjustment, and being provided with anannular grooved way B2 in the lowerend thereof, fora purpose to be fullyexplained hereinafter.

B3 is a platen connected with the platenbracket B and operated in theusual manner.

C is an elevator-bracket for raising and lowering the platen lf andplaten-bracket B, engaging wit-h the latter by means of the integrallugs O and rolls O2, mounted on the axes C3 and adapted to 'lit into andbe traversed by the annular grooved way Bl in the platen-bracket B. Thesole function of the lugs O is to prevent the rolls C2 from beingaccidentally dislodged from the grooved way '32 in the platen-bracket Band to cause the latter to always descend simultaneously with theelevator-bracket C. They are therefore not indispensable tothesuccessful operation of the machine.

D is a rotatable platen-adjusting screw-rod passing through andoperative in a counterpart interiorly-threaded vertical passage in theelevator-bracket O and mounted vertically on the base of the drill-frameand in the arm A2, projecting from the columnar portion thereof.

D D2 are meshed mitered pinions, the former rigidly connected with thescrew-rod D and the latter mounted on the free end of the arm A2 andprovided with a crank D3 fast thereto.

E is a drill-spindle mounted in the usual manner in the bearings E E2inthe bracketed portion of the drill-frame.

E3 is a horizontal shaft mounted in the bearing E".

is a pinion fast to the shaft E3 and meshing with the rack E of thedrillspindle sleeve-bearing ET.

ES is an endwise-detachable hand-lever for raising and lowering thedrill-spindle E.

E is a bevel-gear rigidly connected with the upper portion of thedrill-spindle E and mounted therewith in the Vbearing E.

F is a frame for supporting parts to be described hereinafter.

F is a shipper-supporting rod mounted in the brackets F2 on the frame F.

G is a shaft mounted in the bearings on the frame F parallel to theshipper-supporting lrod F.

G G2 are respectively 'fast and loose pulleys on the shaft G.

G:g is a belt-shipper mounted and adapted to be slid on theshipper-supporting rod F.

.lt is a friction-pulley having spline connection with the shaft G iuorder that it may be freely slid thereon laterally and yet revolvetherewith.

II is a shipper mounted and adapted to be slid on shipper-supporting rodF and engaging with the integral hub Il2 of the pulley II in such amanner as to allow it to freely revolve with its shaft G.

Il3 is a set-screw for detaining the pulley H (through its shipper H) atany desired point along the shaft G.

I is a shaft mounted obliquely in the bearings I I2 I3 on thedrill-frame and frame F.

I4 is a bevel-gear rigidly connected with the upper'end of the shaft Iand meshing with the bevel-gear E9 on the drill-spindle E.

I5 is a cone friction-pulley mounted on the lower portion of the shaft Iin such a manner that any part of its periphery maybe caused to engagefrictionally with the periphery of the friction-pulley H, whichlast-mentioned periphery should be covered with leather or othersuitable elastic material. Obviously the periphery of the conefriction-pulley I5 might be covered with leather instead of theperiphery of the pulley H, if desired.

The pulleys H l5, as shown, are in position to propel the drillspindleat the lowest rate of speed attainable by the machine. To increase therate of speed of the drill-spindle, ship the pulley H toward the shaft Iby means of the shipper H2 and secure the latter to the rod F by meansof the set-screw H3.

Thel drill taken as a whole will be found to be of the simplest and mostcompact construction practicable.

I claiml. Incombination,in adrilling-machine, the column of thedrill-frame, the platen-bracket constructed to slide thereon and h avingan annular grooved wayin the lowerend thereof, the

elevator-bracket provided with rolls adapted to t into and be traversedby the annular grooved way in the platen-bracket, and the platen-adjusting screw-rod passed through the elevator-bracket, substantiallyas and for the purpose specified.

2. In combinati0n,in adrilling-machine, the Y way in the platen-bracket,the platen-adjusting screw-rod passed through the elevatorbracket, thecone friction-pulley, the frictionpulley engaging therewith, and theobliquelymounted and horizontal shafts whereon said frictionpulleys aremounted, substantially as and for the purpose specified.

GUST DALIN.

' Witnesses: I

L. L. MORRISON, E. F. DOWLING.

